User guide

7: Interfaces
SecureLinx Spider/SpiderDuo User Guide 64
Figure 7-23 Keyboard/Mouse Settings Page B
Video
The Spider works by capturing and digitizing the analog video coming from the attached computer.
This analog video may have more or less low-level electrical noise present, depending on the
nature of the video card or embedded video controller.
When viewed on a monitor, this noise (if random) is invisible as the display is being redrawn 60 to
100 times a second. Inside the Spider, however, the algorithm sees that noise as something
changing on the screen, so that requires sending off an update to the client system.
This can result in a constant stream of data even when the image on the target computer’s screen
is not moving. In order to avoid this, at Interface > Video > Miscellaneous Video Settings the
Spider has a selection for noise filter. The larger filter openings will filter out more of the noise, at
the cost of potentially missing small incremental changes and seeing some compression artifacts
(blocky-ness). Filter settings of Medium or High will work for most applications. Be sure to try the
Remote Console Auto Adjust Video button a few times before deciding that a constant stream of
data represents electrical noise requiring a larger filter setting.
To modify video settings, perform the followings steps.
1. Click Interfaces > Video. The Miscellaneous Video Settings page displays.